72718428 has 24 divisors (see below), whose sum is σ = 175528080. Its totient is φ = 23403520.

The previous prime is 72718417. The next prime is 72718441. The reversal of 72718428 is 82481727.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104133 + ... + 104828.

It is an arithmetic number, because the mean of its divisors is an integer number (7313670).

Almost surely, 2^72718428 is an apocalyptic number.

It is an amenable number.

72718428 is an abundant number, since it is smaller than the sum of its proper divisors (102809652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72718428 is a wasteful number, since it uses less digits than its factorization.

72718428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208997 (or 208995 counting only the distinct ones).

The product of its digits is 50176, while the sum is 39.

The square root of 72718428 is about 8527.5100703547. The cubic root of 72718428 is about 417.3958825792.

The spelling of 72718428 in words is "seventy-two million, seven hundred eighteen thousand, four hundred twenty-eight".